Marilyn Manson had a wild, booze-fueled weekend in Vegas, screeching Justin Timberlake songs on karaoke before jokingly attempting to hijack a limo outside a dive bar.

The shock rocker was in vintage form after appearing at a Halloween bash at The Bank nightclub at the Bellagio on Saturday night. Sources said after a costume change and “numerous shots of absinthe,” he insisted on going to a karaoke bar at 4 a.m.

But none were open, so Manson and his friends, including model and on again-off again girlfriend Lindsay Usich, headed to the bar Born and Raised. There, a spy said, “More shots followed, some shotgunned beers, before Marilyn got on the mike and sang The Doors’ ‘Texas Radio’ and a pretty-good version of Timberlake’s ‘Cry Me a River,’ which he sang six times.”

A source at the bar added, “He was insisting on Timberlake music, so somebody had to download it on their iPod.” Another source tells us, “It was a Halloween party, but nobody could believe Manson was there. It was wild.”

But then the bar’s sound system — perhaps because of Manson’s voice — “started crackling loudly,” and, “Marilyn was not happy,” the source said. “He seemed aggravated and wanted to head back to the Strip. Then he got more annoyed when there was no car waiting for him outside.”

Manson zeroed in on an unlucky limo driver waiting outside for another client. Our spy said, “While the driver was making a call, Marilyn jumped into the driver’s seat — but the driver grabbed him and literally dragged him out of the car.”

Manson later whipped out what appeared to be a knife and playfully waved it at his pals until his own limo arrived. Before screeching off he yelled, “I am sorry I went nuts, but I’m a rock star!”

Bar staff said Manson was there but declined further comment. Manson’s rep said he was “at an art show in Mexico” and couldn’t be reached for comment.